Development of derivative of subtracting spectra method for the simultaneous determination of some decongestant drugs. Samarra Journal of Pure and Applied Science, [S. l.], v. 3, n. 3, p. 18–30, 2021. DOI: 10.54153/sjpas.2021.v3i3.264. Disponível em: https://sjpas.com/index.php/sjpas/article/view/264. Acesso em: 9 may. 2026.